javascript,jquery 捕捉鼠标位置

<script type="text/javascript">
function mousePosition(ev)
{  
  if(ev.pageX || ev.pageY)
  {  
    return {x:ev.pageX, y:ev.pageY};  
  }  
  return {  
      x:ev.clientX + document.body.scrollLeft - document.body.clientLeft,  y:ev.clientY + 
      document.body.scrollTop -document.body.clientTop  
  }; 
}  
function mouseMove(ev)
{  
  ev = ev || window.event;  
  var mousePos = mousePosition(ev); 
  document.getElementById('xxx').value = mousePos.x;  
  document.getElementById('yyy').value = mousePos.y;
}
document.onmousemove = mouseMove;
</script>

看到的相关资料
http://www.cnblogs.com/zcy_soft/archive/2010/12/30/1922205.html

http://www.iteye.com/topic/775445

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